Internal combustion engine with multiple combustion chambers

Claim 1

In a two-cycle compression ignition engine including at least one cylinder, a reciprocable piston movable in said cylinder, a piston connecting rod, a crankshaft for operation of said piston connecting rod, a cylinder head enclosing said cylinder, the upper surface of said piston and the enclosing surface of said cylinder head defining a cylinder clearance volume, a first combustion chamber and a second combustion chamber located in said cylinder head, said combustion chambers being independently isolated from one another and from the clearance volume and each chamber defining a passageway in communication with said cylinder clearance volume, an independently operated throttle valve for each combustion chamber and arranged for opening and closing said passageway associated with its respective chamber, and control means for selective operation of a respective throttle valve; the improvement comprising means for isolating the combustion process for one full 360° rotation of said crankshaft; wherein the combustion chambers alternatively provide for expansion of combustion products in the respective chambers into the cylinder volume near top dead center upon each revolution of the crankshaft.